37 velocity-sensitive full-sized keys (a 3 full octaves range plus one note) Modulation and pitch bend wheels Volume/Data knob Octave Up/Down and Program Up/Down back-lit soft-touch buttons Input for an optional sustain or expression pedal Core MIDI (iOS) and USB class compliant (Mac/PC) - plug and play Includes Lightning, USB and Micro-USB cables for compatibility with iPhone, iPad, Mac/PC and Android devices. Comes with SampleTank 3 SE for Mac/PC and unlocks premium content in IK apps on iPhone/iPad